Sliding door lock



p 1957 A. R. ADAMS 2,807,489

SLIDING DOOR LOCK Filed Oct. 21, 1953 Ari/nu- Adams,

INVENTOR.

ltlorney United States PatentO SLIDING DOOR LOCK Arthur R. Adams, Pasadena, Calif., assignor to The Safe Padlock and Hardware Company, Lancaster, Pa., a corporation of Pennsylvania Application October 21, 1953, Serial No. 387,399

Claims. (Cl. 292-17) My invention relates to separable means for holding parts together and relates in particular to a device for holding a sliding door in closed position in a door frame.

It is an object of the invention to provide a preferred embodiment of this invention in a form wherein it may be employed as a sliding door lock for either yieldably holding or locking a sliding door in closed position in its frame.

It is an object of the invention to provide a separable holding or locking device having a receptacle arranged to be mounted on one of the parts which are to be held together and a projection arranged to be mounted on the other of the two parts, this projection being arranged to enter the receptacle and having expansible parts for engaging walls or lips of the receptacle in such a manner that removal of the projection from the receptacle is resisted.

It is a further object of the invention to provide a device of the character referred to in the preceding paragraph h aving means for holding the parts of the projection in expanded condition, thereby locking the projection within the receptacle in order to effect a positive locking together of the parts. The invention lends itself to use with sliding doors or the like because of its novel form, simplicity of construction and ease of installation and operation.

It is also an object to provide a retaining and locking device of this character wherein the projection which serves as a part of the connecting means also serves as a door-moving knob positioned so that it may be grasped when the dooris in fully opened position and which, with the exception of its edge face, is concealed within a wall recess.

In the simple embodiment of the invention disclosed herein, the projection referred to in the foregoing is a knob formed on the projecting end of a pin member and the receptacle is a plate having an opening to receive the knob.

It is a further object of the invention to provide a simple means for automatically effecting alignment of the projection and the receptacle parts of the device as they are brought into engagement with each other without requirement of separate aligning means.

Further objects and advantages of the invention may be brought out in the following part of the specification wherein I have described a preferred embodiment of the invention for the purpose of disclosing its details without limiting the scope of the invention which is defined in the appended claims.

Referring to the accompanying drawings which are for illustrative purpose only:

Fig. 1 is a front face view, to reduced scale, showing a portion of a door frame and the adjacent edge of a door having therein a preferred form of my retaining and locking means;

Fig. 2 is a partly sectioned view to substantially full scale showing the back face of the door and frame members of Fig. 1, with the back cover plate removed;

Fig. 3 is a view similar to a part of Fig. 2, showing the pin and knob portion of the connecting means sectioned on a median plane;

Fig. 4 is an enlarged sectional view taken as indicated by the line 4-4 of Fig. 2;

Fig. 5 is a perspective view of the locking bar;

Fig. 6 is a perspective view of the pin member which carries the knob member of the invention;

Fig. 7 is ,a face view of the dished plate or washer of the receptacle.

In Fig. 1, I show the edge portion 10 of the front face 11 of a sliding door 12 in engagement with a frame member 13. The door 12 is shown in closed position. That is to say, its front edge face 14 is in engagement with the edge face 15 of the frame member 13.

The frame member 13 has therein a receptacle 16 having an opening 17 which receives a projection 18 carried by the door 12 in a position projecting from its edge face 14. In this embodiment of the invention the projection 18 is in the form of a rounded knob 19 arranged to expand in the receptacle 16 beyond the opening 17 so that removal of the knob 19 from the receptacle 16 requires contraction of the knob 19.

As best shown in Fig. 2, the receptacle 16 comprises a dished washer 20 and means for supporting the washer 20 in a shallow recess 21 formed by a wood bit in the edge face 15 of the frame member 13. The means for holding the dished washer 20 in the recess 21 comprises a circular shallow dished member 22 having a cylindrical wall 23 and a radially extending wall 24, there being openings for the passage of screws 25 in both the members 20 and 22 so that the receptacle 16 will be firmly held in place. A hole 26 is drilled inwardly from the bottom of the recess 21 to accommodate'that portion of the knob 19 which projects inwardly from the receptacle 16.

As best shown in Figs. 3 and 6, the projection 18 comprises the head or knob 19 and a shank 27, which shank 27 extends into a sleeve 28, Figs. 2 and 3, which is extended through an opening 29 which connects the edge face 14 of the door 12 with a larger opening or chamber 30 which is bored through the edge portion 10 of the door from the front face 11 to the rear face 31 thereof as shown in Fig. 4, the axis of the opening 30' being perpendicular to the axis of the opening 29 and intersecting the same. The sleeve 28 has on its front end a dished flange 32 which is countersunk into the edge face 14 of the door 12, and screws 33 are extended through the flange 32, and through screw openings 34, the inner threaded ends 35 being threaded into a plate 36 which rests in a recess 37 which extends from the circular wall of the opening 30 and surrounds the sleeve 28. This prevents the pulling out of the sleeve 28 from the door except by breaking out of the wood between the edge face 14 of the door 12 and the opening 30.

The knob 19 and the stem 27 are formed from sheet metal so as to provide a hollow pin structure having a diametral slot 33 which extends entirely along one side of the pin structure 39, around the knob 19 and substantially halfway down the opposite side of the pin structure 39 as indicated by dotted lines 38. Stem 27 and sleeve 28 are attached by screw 40 as shown. The knob 19 is divided into several parts. In the present disclosure it is divided into two parts 19a and 1912 which are resiliently supported in expanded condition. By contractile pressure applied thereto when the knob 19 is pushed into or pulled from the receptacle 16, the parts 19a and 19b are moved toward each other so that the knob 19 will be contracted to an extent permitting it to pass through the opening 17 in the plate or washer 20 of the receptacle 16.

Means 41 are provided for holding the knob 19 in expandedco'nditien so that it cannot be pulled out of V the opening 17 of the receptacle 16, thereby preventing the :door from being opened from the position in which it is shown in Figs. 1 and 2. This locking means 41 is stamped from sheet metal and comprises a bar 42, Fig. 5, having a plate 43 formed on its inner end and having its outer .or front end twisted with relation to the rest of the bar 42 so as to provide a transverse pillar piece 44 arranged to enter the space between the lips 45 at the front ends of the knob parts 19a and 19b when the locking means 41 is moved from the position in which it is shown in Fig. 3 to the positionin which it is shown in Fig. 2. Referring to Fig 3, it will be noted that the sleeve 28 has vertically aligned slots 46 extending from the inner end of the sleeve 28 toward an intermediate portion of the sleeve. When the locking means 41 is .operatively positioned within the pin structure comprising the members 28 and 39, the plate .43 is slidably disposed in the slots 46. .For moving the locking member 41 between advanced and retracted positions as shown in Figs. 2 and 3, an opening 47 is provided in the plate, 43 and the horizontally extended toe 48 of a lever 49 is arranged to extendinto the opening 48, so that by rotation of the lever 49. between the positionsthereof shown in Figs. 2 and 3, the locking means 41 maybe advanced and retracted as desired. The lever 49. is mounted on the inner portion of a stub shaft 50 which extends from a knob 51 through an opening 52 in the center of the bottom wall 53 of a frontcover plate 54 which is seated in the front portion of the opening 31,.this cover plate 54 having a flange 55 extending outwardly over the adjacent portion of the front face 11 of the door 12. The lever 49 includes a perforated plate portion 56 which fits around the stub shaft 50 and isheld in place by a cotter pin 57. The rear portion of the opening or cavity 30 is closed by a rear cover plate .60 in general similar to the front cover plate 54 but having therein a diametrally arranged bar 61 pro vided with threaded openings .62 to receive screws 63 which are extended across the intervening space from .the bottom wall 53 of the front cover plate 54. By the use of this transverse bar 61, I make possible the securing together of the cover plates .by use of transverse screws 63, without the ends of .the screws projecting through the bottom wall of the rear cover plate 60.

In order, that the two partknob 19, such as shown, may pass through the opening 17 of the receptacle washer 20, the opening 17 is laterally elongated as shown in Fig. 7 so as ,tohave a width, measured horizontally, slightly greator than the horizontal width of the knob 19. The upper and lower portions of the opening 11 are defined by arcuate walls orlips 65 to engage the diametrally opposed faces of the knob parts 19a and 19b when the largest diametral portion of the knob 19 has passed through the opening 17 and is expanded in that portion of the receptacle lying interiorly beyond the lips or walls 65 provided by the washer 20.

A further feature of the invention is that it is adapted for use with doors of different thickness, within a reasonablerange, The spacing of the cover plates 54 and 60 may be varied as required by different door thicknesses. The toe 48 of the lever 49 is originally furnished to the customer in a length to pass through the opening 47 of the plate 43 under maximum conditions of spacing of the cover plates 54 and 60. As the spacing between the cover plates 54 and 60 is reduced in accordance with door-thickness requirements, the length of the toe 48 is reduced by cutting the required amount off from the end thereof. A further, and important feature of the invention consists in the provision of a knob arranged to engage a receptacle member which is conically dished toward the openthe knob 19 is in extended relation to the dished outer surface of the flange 32 which is formed on the front end of the sleeve 28. The knob, being expanded to a larger diameter than the shank 27 may be manually, grasped when the door is concealed, except for its edge face 14, in a wall recess provided to receive the door when it isin fully opened position.

A spring member .67 is provided for retaining the locking member 41 in the positions to which it may be ad justed by rotation of the knob 51. This spring member 67 has a coil portion 68 which rests in a small opening 69 in the plate 43, and curved end portion 70 so as to provide resiliently supported parts to frictionally engage the inner wall surfaces of the sleeve 28, thereby providing a frictional drag resisting movement of the locking member 41.

I claim:

1. In lock means for 118$ between an edge portion of a sliding door and the frame member associated therewith, which door has a cavity adjacent its front edge and a pin opening leading .in from the edge face of the door to said cavity: a receptacle adapted to be secured on said frame member in .a position facing said opening, said receptacle having walls defining a head receiving opening; a pin member extending in said opening of said door, said .pin member having an expansible head positioned so as to enter said head receiving opening of said receptacle; locking means extended within said pin member and being movable from a retracted position to an advanced position wherein it will hold said head in expanded condition so that it cannot be withdrawn from said head receiving opening; a plate to cover said cavity; and means carried by said plate operative to actuate said locking means between advanced and retracted positions.

2. In lock means for use between an edge portion of a sliding door and the frame member associated therewith, which .door has a cavity adjacent its front edge and a pin opening leading in from the edge face of the door to said cavity: a receptacle adapted to be secured on said frame member in a position facing said opening, said receptacle having walls defining a head receiving open ing; a pin member extending in said opening of said door, said pin member having an expansible head positioned so as to enter said head receiving opening of said receptacle, said pin member having an axial opening extending from the interior of said head to the opposite end of said pin member; locking means extended within said pin memher and being movable from a retracted position to an ing 17. Therefore, if, when the door is moved toward advanced position, saidlocking member having on the head end thereof a filler piece arranged to enter between parts of said head, when said locking member is in ad vanced position, and prevent collapse of said head and hold said head in expanded condition so that it cannot be withdrawn from said head receiving opening; a plate to cover said cavity; and means carried by said plate operative to actuate said locking means between advanced and retracted positions.

3. In lock means for use between an edge portion of a sliding door and the frame member associated therewith, which door has a cavity adjacent its front edge and a pin opening leading .in from the edge face of the door to .said cavity: a receptacle adapted to be secured in said frame member in a position facing said opening, said receptacle having walls defining a head receiving opening; a pin member extending in said opening of said door, said pin member having an expansible head positioned so as to enter said head receiving opening of said receptacle, said pin member having a flange thereon to engage the edge face of. the door; .a plate in said cavity aligned with said flange; screwmeans connecting said flange and said plate to hold said pin member in said pinopening of said door; locking means extended within said pin member and being movable from a retracted position to an advanced position wherein it will hold said head in expanded condition so that itcannotbe withdrawn from said head receiving opening; a plate to cover said cavity; and means carried by said plate operative to actuate said locking means between advanced and retracted positions.

4. In lock means for use between an edge portion of a sliding door and the framemember associated therewith, which door has a cavity adjacent its front edge and a pin opening leading in from the edge face of the door to said cavity: a receptacle adapted to be secured in said frame member in a position facing said opening, saidreceptacle having walls defining a head receiving opening; a pin member extending in said opening of said door, said pin member having anexpansible head positioned so as to enter said head receiving opening of said receptacle, said head projecting from the edge face of said door so as to provide a knob which may be grasped for the purpose of moving said door; locking means extended within said pin member and being movable from a retracted position to an advanced position wherein it will hold said head in expanded condition so that it cannot be withdrawn from said head receiving opening; a plate to cover said cavity; and means carried by said plate operative to actuate said locking means between advanced and retracted positions.

5. In lock means for use between an edge portion of a sliding door and the frame member associated therewith, which door has a cavity adjacent its front edge and a pin opening leading in from the edge face of the door to said cavity: a receptacle adapted to be secured on said frame member in a position facing said opening, said receptacle having walls defining a head receiving opening and having a concave wall surface leading to said opening; a pin member extending in said opening of said door, said pin member having an expansible head positioned so as to enter said head receiving opening of said receptacle, said pin member having an axial opening extending from the interior of said head to the opposite end of said pin member, and said head being adapted, when disaligned from said head receiving opening to be guided to said head receiving opening by said concave wall surface of said receptacle; locking means extended within said pin member and being movable from a retracted position to an advanced position, said locking member having on the head end thereof a filler piece arranged to enter between parts of said head, when said locking member is in advanced position, and prevent collapse of said head and hold said head in expanded condition so that it cannot be Withdrawn from said head receiving opening; a plate to cover said cavity; and means carried by said plate operative to actuate said locking means between advanced and retracted positions.

References Cited in the file of this patent UNITED STATES PATENTS 

